![\"\"](\"/userfiles/image/steps_images/step1.JPG\")
(a)
\Observe the graph of runner A and runner B.
\Notice that runner A runs at constant speed and runner B starts running slowly and gradually increases his speed until the race is finished.
\![\"\"](\"/userfiles/image/steps_images/step2.JPG\")
(b)
\Observe the graph of runner A and runner B.
\It is observed that after 8 seconds the distance between the runners is maximum, which is more than 25 meters.
\The distance between the runners is maximum after 8 seconds.
\![\"\"](\"/userfiles/image/steps_images/step3.JPG\")
(c)
\Observe the graph of runner A and runner B.
\The Runner B has same speed to Runner A, when the tangent both the curve is parallel to each other.
\The tangent line to the curve B is parallel to the line A at approximately 9 seconds.
\The runners have same velocity at 9 seconds.
\![\"\"](\"/userfiles/image/steps_images/solution.JPG\")
(a)
\Runner A runs at constant speed.
\Runner B starts running slowly and gradually increases.
\(b)
\The distance between the runners is maximum after 8 seconds.
\(c)
\The runners have same velocity at 9 seconds.